Japanese · Nagasaki

Kakuni Braised Pork Belly Soy-Mirin Method

Kakuni (角煮, 'square simmered') is the Japanese approach to braised pork belly — thick blocks of pork belly (3–4cm cubes) simmered for 2–3 hours in sake, soy sauce, mirin, and sugar until the collagen converts to gelatin, the fat becomes translucent and tender, and the whole block trembles with a yielding richness that has become one of the defining textures of Japanese comfort food. The name refers to the characteristic square cut. The method requires initial par-boiling to remove impurities (for 10 minutes with leek and ginger), a rest period, then a long simmer in the braising liquid. Ideally, kakuni is made a day ahead and chilled — the congealed fat layer is removed, and the pork reheated in the reduced sauce which, by then, has achieved a concentrated sweet-soy glaze quality. Simmering in a liquid that starts with sake and mirin burned off before soy is added prevents the harsh alcohol edge that raw sake addition can impart. Nagasaki's Buta no Kakuni (with Chinese-influenced ryukyu-style) uses rice wine, a technique imported from Chinese braised pork traditions, while Tokyo-style uses standard sake and domestic soy. Served with hard-boiled eggs simmered in the same liquid (umani tamago) and blanched spinach with sesame.

ServesFour portions

Total3 hours 30 minutes active, plus overnight chilling

Sourced2of 9 in BC

Cook

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1.2 kg

pork belly

skin on, cut into 3–4 cm square blocks

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For the par-boil

1 stalk

leek

halved lengthways

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30 g

fresh ginger

sliced into coins

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For the braising liquid

200 ml

sake

Not yet stocked in British Columbia

100 ml

mirin

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100 ml

soy sauce

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30 g

sugar

Your own market

To serve

eggs

hard-boiled, peeled

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200 g

spinach

blanched, dressed with sesame

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The Method

Place the pork belly blocks in a pot and cover with cold water. Add the leek and ginger. Bring to a boil and par-boil for 10 minutes. Drain, discard the aromatics, and rinse each block under cold running water. The water should run clear and the surface of the pork should be clean of grey foam and impurities.

Wipe out the pot. Add the sake and mirin and bring to a vigorous boil over high heat. Allow the alcohol to burn off for 2–3 minutes. The sharp, raw alcohol smell will give way to a rounded, sweet fragrance — this signals the alcohol has driven off and the liquid is ready to receive the soy.

Add the soy sauce and sugar to the pot. Stir briefly to dissolve the sugar. Nestle the par-boiled pork blocks into the liquid in a single layer. Cut a circle of baking paper to fit the interior of the pot and rest it directly on the surface of the liquid as an otoshibuta. Bring to the barest simmer — isolated bubbles breaking the surface, never a rolling boil. This is where the dish lives or dies: a boil converts the collagen but drives the muscle fibres apart, producing fibrous rather than silky pork; a bare simmer at this threshold for a full 3 hours yields blocks that tremble and yield under the slightest pressure.

After 2 hours of simmering, add the peeled hard-boiled eggs to the pot, turning them in the liquid. Continue at the same bare simmer for the remaining hour. The eggs should be evenly coloured a deep amber by the time simmering concludes.

Remove the pot from heat and allow to cool to room temperature. Refrigerate overnight. The following day, lift and discard the solidified layer of fat from the surface. The braising liquid beneath will have set to a loose, trembling jelly.

Return the pot to medium heat. Gently reheat the pork and eggs in the liquid, turning the blocks occasionally, until the sauce reduces to a concentrated, glossy sweet-soy glaze that coats each cube. The surface of the pork should shine and the liquid should cling visibly rather than run freely from a spoon.

Arrange the pork blocks and halved eggs in bowls. Spoon the reduced glaze over each portion. Serve alongside the blanched spinach dressed with sesame and steamed white rice. The pork should offer no resistance whatsoever to a chopstick pressed against its side.

III

Quality Hierarchy

Reserve — Heritage-breed pork belly (Berkshire or Kurobuta) with deep intramuscular fat; aged domestic Japanese soy sauce (marudaigaku or barrel-aged); premium hon-mirin (not mirin-style condiment); Nanbubijin or equivalent jizake (craft sake) from a named brewery.

Estate — Free-range pork belly from a known provenance farm; quality hon-mirin and a reputable junmai sake; traditionally brewed Japanese soy sauce (e.g. Kikkoman Naturally Brewed, not reduced-salt).

Market — Standard supermarket pork belly with the skin intact; widely available hon-mirin or aji-mirin; standard all-purpose soy sauce; drinking-quality sake. The dish remains sound at this level provided the method is followed exactly.

House — Any pork belly available, skin-on preferred; mirin-style seasoning; light soy sauce supplemented with a small addition of sugar. Technique, particularly the par-boil, the alcohol burn-off, and the overnight chill, matters far more than ingredient grade at this level.

Sensory Tests

◇Smell. Raw, sharp alcohol smell dissipates from the sake-mirin reduction, replaced by a rounded, sweet fragrance — alcohol has burned off.

◇Touch. After the full simmer, a block of pork yields and trembles when pressed with a chopstick or finger, offering no resistance.

◇Sight. After overnight chilling, the braising liquid has set to a loose, trembling jelly beneath a solid white fat cap.

◇Sight. On reheating, the reduced sauce clings to the pork surface in a glossy, concentrated glaze rather than running freely.

◇Sight. Hard-boiled eggs simmered in the liquid are coloured deep, even amber throughout the whites.

◇Where it lives or dies. The dish lives or dies at the moment the long simmer begins: a rolling boil ruins the collagen conversion, producing fibrous pork; only a sustained, barely perceptible simmer over three hours yields the signature trembling, gelatinous block.

V · Cross-Cuisine Parallels

Chinese hong shao rou (red-braised pork, Mao's pork) — direct cultural ancestor using soy sauce and rice wine to braise pork belly; the Nagasaki Buta no Kakuni lineage passes through this Chinese tradition via ryukyu-style rice wine use (Japanese Cooking: A Simple Art — Shizuo Tsuji; The Japanese Kitchen — Hiroko Shimbo) French poitrine de porc confite — long, low-temperature braise in a sweet-savoury liquid to convert collagen to gelatin and achieve meltingly tender pork belly; the structural logic of both preparations is identical despite wholly different flavour registers (Japanese Cooking: A Simple Art — Shizuo Tsuji)

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What to Pour

The pairing

Nikka From The Barrel

Nikka Whisky — Miyagikyo Distillery · Miyagikyo — Nikka Distillery

Not yet stocked in British Columbia

Whisky

From British Columbia

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Without alcohol

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The whole pairing

VII · Origin & Lineage

Kakuni (角煮, 'square simmered') originates in Nagasaki, where Chinese culinary technique — specifically red-braised pork belly using rice wine and soy — was introduced via trade and cultural contact, producing the ryukyu-style variant of Buta no Kakuni. From Nagasaki the preparation was adopted nationwide. Tokyo-style substitutes standard domestic sake for rice wine. The Okinawan variant, rafute, uses awamori (a local distilled spirit) and constitutes a related but distinct regional form. Sources: Japanese Cooking: A Simple Art — Shizuo Tsuji; The Japanese Kitchen — Hiroko Shimbo.

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